. The SV831DUSBGB 8 Port 1U Rack Mount USB (Universal Serial Bus) PS/2 KVM Switch with OSD offers a dependable computer management tool that means that you can control up to 8 USB (Universal Serial Bus) or PS/2 connected computers from a single keyboard mouse & monitor. The KVM switch offers maximum control allowing you to switch computers using hotkey commands or front panel push-buttons & offers the added convenience of an On Screen Display to quickly access configuration options.A suitable addition to server room operations the 8 port switch can be rack-mounted into 1U of cabinet space & can be cascaded with multiple KVM switches to deliver control of up to 56 computers from this single switch. This high quality USB (Universal Serial Bus) PS/2 KVM Switch is backed by a Star Tech.com 3-year warranty & free lifetime technical support..